1// SPDX-License-Identifier: MIT
2/*
3 * Copyright(c) 2020 Intel Corporation.
4 */
5
6#include "i915_drv.h"
7
8#include "intel_pxp.h"
9#include "intel_pxp_irq.h"
10#include "intel_pxp_pm.h"
11#include "intel_pxp_session.h"
12#include "intel_pxp_types.h"
13
14void intel_pxp_suspend_prepare(struct intel_pxp *pxp)
15{
16	if (!intel_pxp_is_enabled(pxp))
17		return;
18
19	intel_pxp_end(pxp);
20
21	intel_pxp_invalidate(pxp);
22}
23
24void intel_pxp_suspend(struct intel_pxp *pxp)
25{
26	intel_wakeref_t wakeref;
27
28	if (!intel_pxp_is_enabled(pxp))
29		return;
30
31	with_intel_runtime_pm(&pxp->ctrl_gt->i915->runtime_pm, wakeref) {
32		intel_pxp_fini_hw(pxp);
33		pxp->hw_state_invalidated = false;
34	}
35}
36
37static void _pxp_resume(struct intel_pxp *pxp, bool take_wakeref)
38{
39	intel_wakeref_t wakeref;
40
41	if (!intel_pxp_is_enabled(pxp))
42		return;
43
44	/*
45	 * The PXP component gets automatically unbound when we go into S3 and
46	 * re-bound after we come out, so in that scenario we can defer the
47	 * hw init to the bind call.
48	 * NOTE: GSC-CS backend doesn't rely on components.
49	 */
50	if (!HAS_ENGINE(pxp->ctrl_gt, GSC0) && !pxp->pxp_component)
51		return;
52
53	if (take_wakeref)
54		wakeref = intel_runtime_pm_get(&pxp->ctrl_gt->i915->runtime_pm);
55	intel_pxp_init_hw(pxp);
56	if (take_wakeref)
57		intel_runtime_pm_put(&pxp->ctrl_gt->i915->runtime_pm, wakeref);
58}
59
60void intel_pxp_resume_complete(struct intel_pxp *pxp)
61{
62	_pxp_resume(pxp, true);
63}
64
65void intel_pxp_runtime_resume(struct intel_pxp *pxp)
66{
67	_pxp_resume(pxp, false);
68}
69
70void intel_pxp_runtime_suspend(struct intel_pxp *pxp)
71{
72	if (!intel_pxp_is_enabled(pxp))
73		return;
74
75	pxp->arb_is_valid = false;
76
77	intel_pxp_fini_hw(pxp);
78
79	pxp->hw_state_invalidated = false;
80}
81